Deep Structure of the Swiss Alps: Results of NRP 20

Overview

The novel tectonic model of the deep crustal structure of the Alpine collision zone is the result of an integration of seismic reflection and refraction data and structural data. Besides data gathered from the crust/mantle boundary, significant new insight was gained from the shallower structures. This includes 3D, subsurface mapping of Alpine nappes and basement uplifts, as well as valleys incised deeply into the bedrock to levels several hundreds of meters below the present sea level. The structure of the Alps ...

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Overview

The novel tectonic model of the deep crustal structure of the Alpine collision zone is the result of an integration of seismic reflection and refraction data and structural data. Besides data gathered from the crust/mantle boundary, significant new insight was gained from the shallower structures. This includes 3D, subsurface mapping of Alpine nappes and basement uplifts, as well as valleys incised deeply into the bedrock to levels several hundreds of meters below the present sea level. The structure of the Alps is also discussed in the framework of the geodynamic evolution - from Mesozoic sedimentation to Cenozoic subduction and collision. NRP 20 involved researchers from the Swiss Universities and the Federal Institute of Technology, as well as earth scientists from industry. Funding from the Swiss National Science Foundation was subsequently backed up by contributions from the participating universities and the Federal Institute of Technology and from industry. This book will interest students and researchers eager to have an up to date view of the Alpine orogen, its structure and evolution as a typical example of a con- tinental collision zone. The presentation of the full seismic sections, their geological interpretation, as well as geological profiles will interest readers not only in the field of geophysics and geology, but in earth sciences in general.

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Product Details

  • ISBN-13: 9783764352547
  • Publisher: Birkhauser Basel
  • Publication date: 3/20/1997
  • Edition description: 1995
  • Edition number: 1
  • Pages: 380

Table of Contents

Preface
1 Deep structure of the Swiss Alps: an introduction 1
2 Acquisition of seismic reflection data 11
3 Processing of seismic reflection data 15
4 Presentation of seismic reflection data 22
5 Seismic refraction data
5.1 Acquisition of seismic refraction data within NRP 20 25
5.2 Methodological considerations of 3-D crustal structure modeling by 2-D seismic methods 31
6 Laboratory density and seismic properties of Alpine crustal rocks 39
7 Jura Mountains
7.1 Interpretation of seismic lines across the rhomb shaped Val-de-Ruz basin (internal Folded Jura) 45
7.2 The deep structure of the Basel Jura 54
7.3 Young Paleozoic troughs and Tertiary structures in the eastern Folded Jura 59
8 Two cross sections through the Swiss Molasse Basin (lines E4 - E6, W1, W7 - W10) 64
9 Geologic interpretation of the seismic profiles of the Eastern Traverse (lines E1 - E3, E7 - E9): eastern Swiss Alps 73
10 Geologic interpretation of the seismic profiles through the Southern Alps (lines S1 - S7, C3-south) 101
11 Geologic Interpretation of the seismic profiles of the Central Traverse (lines C1, C2, C3-north) 115
12 Geologic Interpretation of the seismic profiles through western Switzerland: Rawil (W1), Val d'Anniviers (W2), Mattertal (W3), Zmutt-Zermatt-Findelen (W4), and Val de Bagnes (W5) 123
13 Compression and uplift of the external massifs in the Helvetic zone 139
13.1 Structure and evolution of the external basement uplifts (Aar, Aiguilles Rouges/Mt. Blanc) 139
13.2 2-D gravimetric study of the crystalline basement of the Rawil depression 154
14 Rifting and collision in the Penninic Zone of eastern Switzerland 160
15 Rifting and collision in the Southern Alps 186
16 Geologic framework and structural evolution of the Western Swiss-Italian Alps 205
17 Geodynamic evolution of the Tethyan margins of the Western Alps 233
18 Seismicity and seismotectonics of the Swiss Alps 241
19 Recent crustal movements, geoid and density distribution: contribution from integrated satellite and terrestrial measurements 251
20 Alpine cooling and uplift 260
21 Incision and backfilling of Alpine valleys: Pliocene, Pleistocene and Holocene processes 265
22 Integrated cross section and tectonic evolution of the Alps along the Eastern Traverse 289
23 A 3D crustal model of the Swiss Alps based on an integrated interpretation of seismic refraction and NRP 20 seismic reflection data 305
24 Crustal and lithospheric structures of the Western Alps: geodynamic significance 326
25 The lithosphere-asthenosphere system of the Alps 338
References 349
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